C++ QAccessibleInterface::state方法代码示例

HRESULT STDMETHODCALLTYPE QWindowsAccessible::get_accSelection(VARIANT *pvarChildren)
{
#ifdef DEBUG_SHOW_ATCLIENT_COMMANDS
    showDebug(__FUNCTION__, accessible);
#endif //DEBUG_SHOW_ATCLIENT_COMMANDS
    if (!accessible->isValid())
        return E_FAIL;

    int cc = accessible->childCount();
    QVector<int> sel(cc);
    int selIndex = 0;
    for (int i = 1; i <= cc; ++i) {
        QAccessibleInterface *child = 0;
        int i2 = accessible->navigate(Child, i, &child);
        bool isSelected = false;
        if (child) {
            isSelected = child->state(0) & Selected;
            delete child;
            child = 0;
        } else {
            isSelected = accessible->state(i2) & Selected;
        }
        if (isSelected)
            sel[selIndex++] = i;
    }
    sel.resize(selIndex);
    if (sel.isEmpty()) {
        (*pvarChildren).vt = VT_EMPTY;
        return S_FALSE;
    }
    if (sel.size() == 1) {
        (*pvarChildren).vt = VT_I4;
        (*pvarChildren).lVal = sel[0];
        return S_OK;
    }
    IEnumVARIANT *iface = new QWindowsEnumerate(sel);
    IUnknown *uiface;
    iface->QueryInterface(IID_IUnknown, (void**)&uiface);
    (*pvarChildren).vt = VT_UNKNOWN;
    (*pvarChildren).punkVal = uiface;

    return S_OK;
}

HRESULT STDMETHODCALLTYPE QWindowsAccessible::get_accState(VARIANT varID, VARIANT *pvarState)
{
#ifdef DEBUG_SHOW_ATCLIENT_COMMANDS
    showDebug(__FUNCTION__, accessible);
#endif //DEBUG_SHOW_ATCLIENT_COMMANDS
    if (!accessible->isValid())
        return E_FAIL;

    (*pvarState).vt = VT_I4;
    (*pvarState).lVal = accessible->state(varID.lVal);
    return S_OK;
}

    static bool populateNode(JNIEnv *env, jobject /*thiz*/, jint objectId, jobject node)
    {
        QAccessibleInterface *iface = interfaceFromId(objectId);
        if (!iface || !iface->isValid()) {
            __android_log_print(ANDROID_LOG_WARN, m_qtTag, "Accessibility: populateNode for Invalid ID");
            return false;
        }
        QAccessible::State state = iface->state();
        const QStringList actions = QAccessibleBridgeUtils::effectiveActionNames(iface);
        const bool hasClickableAction = actions.contains(QAccessibleActionInterface::pressAction())
                                        || actions.contains(QAccessibleActionInterface::toggleAction());
        const bool hasIncreaseAction = actions.contains(QAccessibleActionInterface::increaseAction());
        const bool hasDecreaseAction = actions.contains(QAccessibleActionInterface::decreaseAction());

        // try to fill in the text property, this is what the screen reader reads
        jstring jdesc = descriptionForAccessibleObject_helper(env, iface);

        if (QAccessibleTextInterface *textIface = iface->textInterface()) {
            if (m_setTextSelectionMethodID && textIface->selectionCount() > 0) {
                int startSelection;
                int endSelection;
                textIface->selection(0, &startSelection, &endSelection);
                env->CallVoidMethod(node, m_setTextSelectionMethodID, startSelection, endSelection);
            }
        }

        env->CallVoidMethod(node, m_setEnabledMethodID, !state.disabled);
        env->CallVoidMethod(node, m_setCheckableMethodID, (bool)state.checkable);
        env->CallVoidMethod(node, m_setCheckedMethodID, (bool)state.checked);
        env->CallVoidMethod(node, m_setFocusableMethodID, (bool)state.focusable);
        env->CallVoidMethod(node, m_setFocusedMethodID, (bool)state.focused);
        env->CallVoidMethod(node, m_setVisibleToUserMethodID, !state.invisible);
        env->CallVoidMethod(node, m_setScrollableMethodID, hasIncreaseAction || hasDecreaseAction);
        env->CallVoidMethod(node, m_setClickableMethodID, hasClickableAction);

        // Add ACTION_CLICK
        if (hasClickableAction)
            env->CallVoidMethod(node, m_addActionMethodID, (int)16);    // ACTION_CLICK defined in AccessibilityNodeInfo

        // Add ACTION_SCROLL_FORWARD
        if (hasIncreaseAction)
            env->CallVoidMethod(node, m_addActionMethodID, (int)4096);    // ACTION_SCROLL_FORWARD defined in AccessibilityNodeInfo

        // Add ACTION_SCROLL_BACKWARD
        if (hasDecreaseAction)
            env->CallVoidMethod(node, m_addActionMethodID, (int)8192);    // ACTION_SCROLL_BACKWARD defined in AccessibilityNodeInfo


        //CALL_METHOD(node, "setText", "(Ljava/lang/CharSequence;)V", jdesc)
        env->CallVoidMethod(node, m_setContentDescriptionMethodID, jdesc);

        return true;
    }

QAccessibleInterface *QQmlAccessible::childAt(int x, int y) const
{
    // Note that this function will disregard stacking order.
    // (QAccessibleQuickView::childAt() does this correctly and more efficient)

    // If the item clips its children, we can return early if the coordinate is outside its rect
    if (clipsChildren()) {
        if (!rect().contains(x, y))
            return 0;
    }

    for (int i = childCount() - 1; i >= 0; --i) {
        QAccessibleInterface *childIface = child(i);
        if (childIface && !childIface->state().invisible) {
            if (childIface->rect().contains(x, y))
                return childIface;
        }
    }
    return 0;
}

 QAccessible::State state() const {
     QAccessibleInterface *parentInterface = parent();
     QAccessible::State state = parentInterface->state();
     delete parentInterface;
     return state;
 }

/*! \reimp */
int QAccessibleWidget::navigate(RelationFlag relation, int entry,
                                QAccessibleInterface **target) const
{
    if (!target)
        return -1;

    *target = 0;
    QObject *targetObject = 0;

    QWidgetList childList = childWidgets(widget());
    bool complexWidget = childList.size() < childCount();

    switch (relation) {
    // Hierarchical
    case Self:
        targetObject = object();
        break;
    case Child:
        if (complexWidget) {
            if (entry > 0 && entry <= childCount())
                return entry;
            return -1;
        }else {
            if (entry > 0 && childList.size() >= entry)
                targetObject = childList.at(entry - 1);
        }
        break;
    case Ancestor:
        {
            if (entry <= 0)
                return -1;
            targetObject = widget()->parentWidget();
            int i;
            for (i = entry; i > 1 && targetObject; --i)
                targetObject = targetObject->parent();
            if (!targetObject && i == 1)
                targetObject = qApp;
        }
        break;
    case Sibling:
        {
            QAccessibleInterface *iface = QAccessible::queryAccessibleInterface(parentObject());
            if (!iface)
                return -1;

            iface->navigate(Child, entry, target);
            delete iface;
            if (*target)
                return 0;
        }
        break;

    // Geometrical
    case QAccessible::Left:
        if (complexWidget && entry) {
            if (entry < 2 || widget()->height() > widget()->width() + 20) // looks vertical
                return -1;
            return entry - 1;
        }
        // fall through
    case QAccessible::Right:
        if (complexWidget && entry) {
            if (entry >= childCount() || widget()->height() > widget()->width() + 20) // looks vertical
                return -1;
            return entry + 1;
        }
        // fall through
    case QAccessible::Up:
        if (complexWidget && entry) {
            if (entry < 2 || widget()->width() > widget()->height() + 20) // looks horizontal
                return - 1;
            return entry - 1;
        }
        // fall through
    case QAccessible::Down:
        if (complexWidget && entry) {
            if (entry >= childCount() || widget()->width() > widget()->height()  + 20) // looks horizontal
                return - 1;
            return entry + 1;
        } else {
            QAccessibleInterface *pIface = QAccessible::queryAccessibleInterface(parentObject());
            if (!pIface)
                return -1;

            QRect startg = rect(0);
            QPoint startc = startg.center();
            QAccessibleInterface *candidate = 0;
            int mindist = 100000;
            int sibCount = pIface->childCount();
            for (int i = 0; i < sibCount; ++i) {
                QAccessibleInterface *sibling = 0;
                pIface->navigate(Child, i+1, &sibling);
                Q_ASSERT(sibling);
                if ((relationTo(0, sibling, 0) & Self) || (sibling->state(0) & QAccessible::Invisible)) {
                    //ignore ourself and invisible siblings
                    delete sibling;
                    continue;
                }

//.........这里部分代码省略.........

/*! \reimp */
QAccessible::Relation QAccessibleWidget::relationTo(int child,
            const QAccessibleInterface *other, int otherChild) const
{
    Relation relation = Unrelated;
    if (d->asking == this) // recursive call
        return relation;

    QObject *o = other ? other->object() : 0;
    if (!o)
        return relation;

    QWidget *focus = widget()->focusWidget();
    if (object() == focus && isAncestor(o, focus))
        relation |= FocusChild;

    QACConnectionObject *connectionObject = (QACConnectionObject*)object();
    for (int sig = 0; sig < d->primarySignals.count(); ++sig) {
        if (connectionObject->isSender(o, d->primarySignals.at(sig).toAscii())) {
            relation |= Controller;
            break;
        }
    }
    // test for passive relationships.
    // d->asking protects from endless recursion.
    d->asking = this;
    int inverse = other->relationTo(otherChild, this, child);
    d->asking = 0;

    if (inverse & Controller)
        relation |= Controlled;
    if (inverse & Label)
        relation |= Labelled;

    if(o == object()) {
        if (child && !otherChild)
            return relation | Child;
        if (!child && otherChild)
            return relation | Ancestor;
        if (!child && !otherChild)
            return relation | Self;
    }

    QObject *parent = object()->parent();
    if (o == parent)
        return relation | Child;

    if (o->parent() == parent) {
        relation |= Sibling;
        QAccessibleInterface *sibIface = QAccessible::queryAccessibleInterface(o);
        Q_ASSERT(sibIface);
        QRect wg = rect(0);
        QRect sg = sibIface->rect(0);
        if (wg.intersects(sg)) {
            QAccessibleInterface *pIface = 0;
            sibIface->navigate(Ancestor, 1, &pIface);
            if (pIface && !((sibIface->state(0) | state(0)) & Invisible)) {
                int wi = pIface->indexOfChild(this);
                int si = pIface->indexOfChild(sibIface);

                if (wi > si)
                    relation |= QAccessible::Covers;
                else
                    relation |= QAccessible::Covered;
            }
            delete pIface;
        } else {
            QPoint wc = wg.center();
            QPoint sc = sg.center();
            if (wc.x() < sc.x())
                relation |= QAccessible::Left;
            else if(wc.x() > sc.x())
                relation |= QAccessible::Right;
            if (wc.y() < sc.y())
                relation |= QAccessible::Up;
            else if (wc.y() > sc.y())
                relation |= QAccessible::Down;
        }
        delete sibIface;

        return relation;
    }

    if (isAncestor(o, object()))
        return relation | Descendent;
    if (isAncestor(object(), o))
        return relation | Ancestor;

    return relation;
}